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In GNU Make 3.80, glob wildcards were not expanded in pattern dependency lines. In 3.81 they were expanded, but sometimes in the wrong directory. In 3.82, we get the 3.81 behavior when second expansion is triggered, and otherwise the 3.80 behavior.

Should glob expansion be suppressed for pattern dependency lines, as was historically the case, even after second expansion? If not, then it may be best to prefix the stem directory before globbing, instead of after globbing.

Consider this makefile:

(The "TRIGGER" stuff can be necessary to ensure that the second expansion code path is followed.) Consider also this directory tree:

Linux GNU Make 3.82 and 3.80 with no command line arguments (the historical behavior):

Linux GNU Make 3.82 with "SEC=yes" on the command line, and also 3.81 regardless of command line arguments:

Note that globbing matches "foo.y" to "foo.ytop" in the top-level directory, even though GNU Make then prefixes "dir/". If globbing is desired, then I think it would make more sense to match "dir/foo.y" against "dir/foo.ybot".